Some women will experience weight gain when they are nearing their menstrual period, with an approximate weight gain of 0.5-2 pounds. The increased secretion of estrogen in women’s bodies when their periods are approaching causes the pelvic tissues to be in a congested and edematous state, resulting in a slight weight gain, which is a normal physiological change. Some women have diarrhea before and during menstruation, resulting in intestinal water loss, there will be a physiological weight loss phenomenon, if women have constipation before or during menstruation, the body can not be discharged in time, there will also be a slight increase in weight. It is normal to have a slight weight fluctuation when menstruation is approaching, it is a physiological fluctuation, no need to intervene, most of the weight can be restored to the normal range after the end of menstruation.